Scribing The aluminum triangle ruler includes multiple notch marks so scribing is simple, Place one side flush with the edge of the object, then slide the ruler to get the length you want.
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Protractor Set the Rafter Square against your board and pivot to the angle you need. The carpenter square is clearly marked from 1 to 90 degrees, making it very easy for you.
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Center of circle The intersection of the two straight lines is the center of the circle
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Assisted cutting Another groove parallel to the degree scale is with two upper and lower scales for easy cutting.
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